/Engine/Plugins/Experimental/Mutable/Source/CustomizableObject/Classes/MuCO/CustomizableObjectSystem.h
In case IsTextureParameterValueUnreal returns true, this will be used to query the texture.
virtual [UTexture2D](API\Runtime\Engine\Engine\UTexture2D) * GetTextureParameterValue ( const [FName](API\Runtime\Core\UObject\FName) & ID )